operating systems internals and design principles 7th edition ppt

... an operating system running on the hardware platform• Platforms and the operating systems of client and server may differ• These lower-level differences are irrelevant as long as a client and ... middleware services and functions– Single process space– Checkpointing Trang 51 Clusters Compared to SMP• SMP is easier to manage and configure• SMP takes up less space and draws less power ... Set of tools that provide a uniform means and style of access to system resources across all platforms• Enable programmers to build applications that look and feel the same Trang 27 Reliability

Ngày tải lên: 16/05/2017, 13:42

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Concurrency: Deadlock and Starvation Patricia Roy Manatee Community ... channels, main and secondary memory, devices, and data structures such as files, databases, and semaphores • Deadlock occurs if each process holds one resource and requests the other Reusable Resources ... process at a time and not depleted by that use Processes obtain resources that they later release for reuse by other processes Reusable Resources • Processors, I/O channels, main and secondary memory,

Ngày tải lên: 16/05/2017, 13:52

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Memory Management Patricia Roy Manatee ... Segmentation The need for memory management • Memory is cheap today, and getting cheaper – But applications are demanding more and more memory, there is never enough! • Memory Management, involves ... address is not within bounds, an interrupt is generated to the operating system Paging • Partition memory into small equal fixed-size chunks and divide each process into the same size chunks • • The

Ngày tải lên: 16/05/2017, 13:52

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Uniprocessor Scheduling Dave Bremer ... is based on process type and execution history Scheduling Formula Bands • • Priorities are recomputed once per second Base priority divides all processes into fixed bands of priority levels – ... deadlines) Types of Scheduling Two Suspend States • Remember this diagram from Chapter Scheduling and Process State Transitions Nesting of Scheduling Functions Queuing Diagram Feedback Scheduling

Ngày tải lên: 16/05/2017, 13:52

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter 11 I/O Management and Disk Scheduling Dave Bremer Otago Polytechnic, ... memory and can’t be swapped out – Device is tied to process and unavailable for other processes I/O for Device Types Roadmap – I/O Devices – Organization of the I/O Function – Operating System Design ... part of the operating system and can be used with any set of multiple disks • • RAID 0, and RAID are supported In the case of RAID (disk mirroring), the two disks containing the primary and mirrored

Ngày tải lên: 16/05/2017, 13:53

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter 12 File Management Roadmap • Overview • • • • • • • • • File organisation and Access File Directories ... Fields and Records • Fields – Basic element of data – Contains a single value – Characterized by its length and data type • Records – Collection of related fields – Treated as a unit File and Database ... of NTFS – Recoverability – Security – Large disks and large files – Multiple data streams – Journaling – Compression and Encryption NTFS Volume and File Structure • Sector – The smallest physical

Ngày tải lên: 16/05/2017, 13:53

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter 13 Embedded Systems Dave Bremer Otago Polytechnic, N.Z ©2008, Prentice Hall Roadmap • • • • Embedded Systems ... Characteristics of Embedded Operating Systems eCos TinyOS Embedded System • One of the most important and widely used categories of operating systems • • • Hardware and software designed to perform a ... OS and adapt it for embedded purposes – Design a purpose-built OS solely for embedded use Mutexes Mutexes and Condition Variables Mutexes and Condition Variables Roadmap • • • • Embedded Systems

Ngày tải lên: 16/05/2017, 13:53

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter 14 Computer Security Threats Roadmap • • • • • • Computer Security Concepts Threats, Attacks, and Assets ... other systems • Remote execution capability – A worm executes a copy of itself on another system • Remote log-in capability – A worm logs on to a remote system as a user and then uses commands ... Roadmap • • • • • • Computer Security Concepts Threats, Attacks, and Assets Intruders Malicious Software Overview Viruses, Worms, and Bots Rootkits Threats • RFC 2828, describes four kinds of threat

Ngày tải lên: 16/05/2017, 13:53

... 15Computer Security TechniquesDave BremerOtago Polytechnic, N.Z.©2008, Prentice HallOperating Systems: Internals and Design Principles, 6/EWilliam StallingsTrang 2• Authentication• Access Control• Intrusion ... Threshold random walk (TRW) scan detectione Rate limitingf Rate haltingTrang 41Botnet and Rootkit Countermeasures• IDS and Anti-Viral techniques are useful against bots– Main aim is to detect and disable ... Authentication• Includes– Facial characteristics– Fingerprints– Hand geometry– Retinal pattern• Based on pattern recognition,– technically complex and expensive Trang 15Dynamic Biometric Authentication•

Ngày tải lên: 16/05/2017, 13:53

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Computer System Overview Patricia Roy Manatee Community College, Venice, FL ©2008, Prentice Hall Operating ... store program and data files Cache Memory • • Processor speed faster than memory access speed Exploit the principle of locality with a small fast memory Cache and Main Memory Cache Principles • ... memory, and I/O modules Computer Components: Top-Level View Processor Registers • User-visible registers – Enable programmer to minimize main memory references by optimizing register use • Control and

Ngày tải lên: 16/05/2017, 14:03

... Operating Systems? ?? Symmetric multiprocessing (SMP)– There are multiple processors– These processors share same main memory and I/O facilities Trang 57 Modern Operating Systems? ?? Distributed operating ... system that is in main memory Trang 13 Evolution of Operating Systems? ?? Serial processing– No operating system Trang 14 Evolution of Operating Systems? ?? Serial processing– Schedule time– Setup included ... facilities Trang 57 Modern Operating Systems? ?? Distributed operating systems Trang 58 Modern Operating Systems? ?? Object-oriented design? ?? Used for adding modular extensions to a small kernel– Enables

Ngày tải lên: 16/05/2017, 14:03

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Process Description and Control Dave Bremer Otago Polytechnic, N.Z ... Contains the process elements Created and manage by the operating system • Allows support for multiple processes Process-based Operating System • Process-based operating system – Implement the OS ... – Clandestine user (outside or insider) • Malicious software (malware) Countermeasures: Intrusion Detection • Intrusion detection systems are typically designed to detect human intruder and malicious

Ngày tải lên: 16/05/2017, 14:03

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Threads, SMP, and Microkernels Roadmap • Threads: Resource ownership and execution • Symmetric ... inter-process communication and synchronization – How processes are related to each other Windows Processes • Processes and services provided by the Windows Kernel are relatively simple and general purpose ... with other processes • These two characteristics are treated independently by the operating system Processes and Threads • The unit of dispatching is referred to as a thread or lightweight process

Ngày tải lên: 16/05/2017, 14:04

... EVOLUTION OF OPERATING SYSTEMS In attempting to understand the key requirements for an OS and the significance of the major features of a contemporary OS, it is useful to consider how operating ... Memory Motivation Cache Principles Cache Design 1.7 I/O Communication Techniques Programmed I/O Interrupt-Driven I/O Direct Memory Access 1.8 Recommended Reading and Web Sites 1.9 Key Terms, Review Questions, and ... Hennessy, J., and Patterson, D.Computer Architecture:A Quantitative Approach. San Mateo, CA: Morgan Kaufmann, 2007. PATT07 Patterson, D., and Hennessy,J. Computer Organization and Design: The Hardware/ Software...

Ngày tải lên: 19/03/2014, 13:41

... repeaters and network interfaces; and software components, including protocol stacks, communication handlers and drivers. The resulting functionality and performance available to distributed system and ... over 5,000 star systems) and multifarious social and economic systems. The number of players is also rising, with systems able to support over 50,000 simultaneous online players (and the total ... below and are based on cryptography and authentication. Defeating security threats • Here we introduce the main techniques on which secure systems are based. Chapter 11 discusses the design and...

Ngày tải lên: 27/03/2014, 23:12

... Analysis and Design 12. Designing the Human Interface 13. Systems Implementation and Operation myriam.lewkowicz@u tt.fr 31 General Types of Information Systems Management Information Systems Types ... components: Technology, people, organizations Understand IS career opportunities Understand types of information systems Understand IS and organizational success or failure Understand the future of IS management myriam.lewkowicz@u tt.fr 46 Enterprise ... 4 Enterprise-Wide Information Systems myriam.lewkowicz@u tt.fr 45 Chapter Objectives Understand how information technology supports business activities Understand enterprise systems and how they evolved Understand software...

Ngày tải lên: 04/11/2013, 19:15

... of this edition remain the same as those of previous editions: namely, to explain and discuss critically the general principles of the constitutional law and administrative law of the UK and to ... Limited Easton, Bristol, England Printed and bound in Great Britain by Creative Print & Design (Wales), Ebbw Vale General Principles of Constitutional and Administrative Law Fourth Edition John Alder Alconbury ... Standley FAMILY LAW (3rd edn) David Cowan HOUSING LAW AND POLICY Tina Hart and Linda Fazzani INTELLECTUAL PROPERTY LAW (2nd edn) Kate Green and Joe Cursley LAND LAW (4th edn) Margaret Wilkie and...

Ngày tải lên: 18/02/2014, 05:20

... conduction and valence bands of an insulator, semiconductor, and conductor. Energy Energy Energy E > 5 eV g Valence band Conduction band Valence band Conduction band Conduction band The bands overlap Electrons "free" ... Com- plete systems now appear on wafers thousands of times smaller than the single ele- ment of earlier networks. New designs and systems surface weekly. The engineer be- comes more and more limited ... light-emitting diode (LED) and the liquid-crystal display (LCD). Since the LED falls within the family of p-n junction devices and will appear in some of SEVENTH EDITION E LECTRONIC D EVICES AND C IRCUIT T HEORY ROBERT...

Ngày tải lên: 03/03/2014, 23:58

... out. 1.6 The Role of the Analyst and Designer Earlier in this chapter we said that systems analysts and designers change the world. In discussing the role of the analyst and designer we should therefore begin ... book is about systems analysis and design, and it’s been written for people who are analysts or designers already or people who are thinking about making a career in analysis and design. This book ... applications and busi- ness experience and those for designers specify software environment and hard- ware architectures. Life is complicated further by the many sorts of analyst and designer titles,...

Ngày tải lên: 22/03/2014, 18:20

... Objectives Understand the term information systems (IS) Understand IS components: Technology, people, organizations Understand IS career opportunities Understand types of information systems Understand IS and ... Modeling 11. Object Oriented Analysis and Design 12. Designing the Human Interface 13. Systems Implementation and Operation 29 General Types of Information Systems Data input Manual data entry Semiautomated ... Resources Benefits Marketing 45 Chapter Objectives Understand how information technology supports business activities Understand enterprise systems and how they evolved Understand software applications that are internally...

Ngày tải lên: 22/03/2014, 21:21